Note 13 - Regulatory Capital - Capital Amounts and Ratios (Details) $ in Thousands	Mar. 31, 2024 USD ($)
Common equity tier 1 capital, actual amount	$ 105,437
Common equity tier 1 capital, actual percent of asset	0.1164	[1]
Common equity tier 1 capital, amount required to be adequately capitalized	$ 40,757
Common equity tier 1 capital, percent of assets required to be adequately capitalized	0.045	[1]
Common equity tier 1 capital, excess capital amount	$ 64,680
Common equity tier 1 capital, excess capital percent of assets	0.0714	[1]
Common equity tier 1 capital, amount to be well capitalized under prompt corrective action provisions	$ 58,872
Common equity tier 1 capital, percent of assets to be well capitalized under prompt corrective action provisions	0.065	[1]
Tier 1 leverage, actual amount	$ 105,437
Tier 1 leverage, actual percent of asset	0.0918	[1]
Tier 1 leverage, amount required to be adequately capitalized	$ 45,957
Tier 1 leverage, percent of assets required to be adequately capitalized	0.04	[1]
Tier 1 leverage, excess capital amount	$ 59,480
Tier 1 leverage, excess capital percent of assets	0.0518	[1]
Tier 1 leverage, amount to be well capitalized under prompt corrective action provisions	$ 57,446
Tier 1 leverage, percent of assets to be well capitalized under prompt corrective action provisions	0.05	[1]
Tier 1 risk-based capital, actual amount	$ 105,437
Tier 1 risk-based capital, actual percent of asset	0.1164	[1]
Tier 1 risk-based capital, amount required to be adequately capitalized	$ 54,343
Tier 1 risk-based capital, percent of assets required to be adequately capitalized	0.06	[1]
Tier 1 risk-based capital, excess capital amount	$ 51,094
Tier 1 risk-based capital, excess capital percent of assets	0.0564	[1]
Tier 1 risk-based capital, amount to be well capitalized under prompt corrective action provisions	$ 72,458
Tier 1 risk-based capital, percent of assets to be well capitalized under prompt corrective action provisions	0.08	[1]
Total risk-based capital, actual amount	$ 116,762
Total risk-based capital, actual percent of asset	0.1289	[1]
Total risk-based capital, amount required to be adequately capitalized	$ 72,458
Total risk-based capital, percent of assets required to be adequately capitalized	0.08	[1]
Total risk-based capital, excess capital amount	$ 44,304
Total risk-based capital, excess capital percent of assets	0.0489	[1]
Total risk-based capital, amount to be well capitalized under prompt corrective action provisions	$ 90,572
Total risk-based capital, percent of assets to be well capitalized under prompt corrective action provisions	0.10	[1]

[1] Based upon the Bank’s adjusted total assets for the purpose of the Tier 1 leverage capital ratio and risk-weighted assets for the purpose of the risk-based capital ratios.